Would you guys remove rear seats + heated/power passenger seat in a 335i saloon for race days? I've restored an E36 interior from the ground up and the E90 looks very similar. I think it could save 100 lbs?

Also, how would you prevent CEL/SRS lights with an unconnected passenger seat? I know about disconnecting the negative terminal before messing with wiring but what about reconnecting negative with no passenger seat installed? Do you need to fool/loop the SRS into thinking the seat is installed?